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Policy and the financial sector · 11 of 33

Does supply-side policy work?

Weigh the case each way on whether supply-side policy raises growth

Key terms
Potential output
Potential output, or potential GDP, is the maximum quantity an economy can produce given full employment of its existing labour, physical capital, technology and institutions.
Natural rate of unemployment
The natural rate of unemployment is the rate that would exist in a growing and healthy economy from the economic, social and political factors of the time.

Neoclassical economists argue that lasting growth has to come from the supply side

Neoclassical economists hold that wages and prices are flexible, so in the long run output settles at potential GDP whatever happens to aggregate demand, and a rise in demand only raises the price level. The lasting way to raise output is to raise potential GDP itself: investment in human capital, physical capital and technology, in a market setting that rewards innovation, and reforms that lower the natural rate of unemployment.

More demand against more capacityVertical axis: Price level. Horizontal axis: Real GDP. AD0: a downward-sloping line. AD1: a downward-sloping line. LRAS0: a vertical line. LRAS1: a vertical line. AD0 meets LRAS0, at price P0 and Y0 on the horizontal axis. AD1 meets LRAS0, at price P1. AD0 meets LRAS1, at price P2 and Y1 on the horizontal axis.Y0P0P1Y1P2AD0AD1LRAS0LRAS1
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BeforeOutput is at potential, Y0, where LRAS0 stands, and the price level is P0.

On a vertical LRAS, more demand only raises prices; more capacity raises output and eases prices.